Another great story at GigaOm — this one by Ryan Kim — regarding Twitter’s threats to client developers:

The saga over Twitter’s new hardline stance against developers
just got more interesting. While Twitter officials downplay
the company’s crusade against new third-party Twitter
clients, with claims 90 percent of active Twitter members use
official Twitter apps on a monthly basis, fresh analysis suggests
third-party Twitter apps account for much more traffic: 42
percent, according Sysomos, a social media analytics company.

This makes sense. Casual users are more likely to use Twitter’s official clients and the twitter.com website, but active users are more likely to use third-party clients.